*{
    margin: 0;
}
h1 {
    text-align: center;
}
.search-bar, .showTable {
    margin-bottom: 20px;
    padding: 10px;
    box-shadow: rgba(157, 157, 157, 0.56) 0 0 10px;
}
label {
    font-weight: normal;
    margin: 0 5px;
}
.glyphicon-book {
    top: 5px;
}
#startTime, #endTime, #name, #author, #code{
    width: 200px;
}
.btn {
    margin-left: 10px;
}
hr {
    border: rgba(157, 157, 157, 0.56) 2px solid;
}